diff options
Diffstat (limited to 'drivers/pci/dmar.c')
| -rw-r--r-- | drivers/pci/dmar.c | 61 |
1 files changed, 50 insertions, 11 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 7b287cb38b7a..22b02c6df854 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -33,9 +33,10 @@ #include <linux/timer.h> #include <linux/irq.h> #include <linux/interrupt.h> +#include <linux/tboot.h> +#include <linux/dmi.h> -#undef PREFIX -#define PREFIX "DMAR:" +#define PREFIX "DMAR: " /* No locks are needed as DMA remapping hardware unit * list is constructed at boot time and hotplug of @@ -353,6 +354,7 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) struct acpi_dmar_hardware_unit *drhd; struct acpi_dmar_reserved_memory *rmrr; struct acpi_dmar_atsr *atsr; + struct acpi_dmar_rhsa *rhsa; switch (header->type) { case ACPI_DMAR_TYPE_HARDWARE_UNIT: @@ -374,6 +376,12 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) atsr = container_of(header, struct acpi_dmar_atsr, header); printk(KERN_INFO PREFIX "ATSR flags: %#x\n", atsr->flags); break; + case ACPI_DMAR_HARDWARE_AFFINITY: + rhsa = container_of(header, struct acpi_dmar_rhsa, header); + printk(KERN_INFO PREFIX "RHSA base: %#016Lx proximity domain: %#x\n", + (unsigned long long)rhsa->base_address, + rhsa->proximity_domain); + break; } } @@ -413,6 +421,12 @@ parse_dmar_table(void) */ dmar_table_detect(); + /* + * ACPI tables may not be DMA protected by tboot, so use DMAR copy + * SINIT saved in SinitMleData in TXT heap (which is DMA protected) + */ + dmar_tbl = tboot_get_dmar_table(dmar_tbl); + dmar = (struct acpi_table_dmar *)dmar_tbl; if (!dmar) return -ENODEV; @@ -452,9 +466,13 @@ parse_dmar_table(void) ret = dmar_parse_one_atsr(entry_header); #endif break; + case ACPI_DMAR_HARDWARE_AFFINITY: + /* We don't do anything with RHSA (yet?) */ + break; default: printk(KERN_WARNING PREFIX - "Unknown DMAR structure type\n"); + "Unknown DMAR structure type %d\n", + entry_header->type); ret = 0; /* for forward compatibility */ break; } @@ -570,9 +588,6 @@ int __init dmar_table_init(void) printk(KERN_INFO PREFIX "No ATSR found\n"); #endif -#ifdef CONFIG_INTR_REMAP - parse_ioapics_under_ir(); -#endif return 0; } @@ -632,20 +647,31 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG); iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG); + if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) { + /* Promote an attitude of violence to a BIOS engineer today */ + WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n" + "BIOS vendor: %s; Ver: %s; Product Version: %s\n", + drhd->reg_base_addr, + dmi_get_system_info(DMI_BIOS_VENDOR), + dmi_get_system_info(DMI_BIOS_VERSION), + dmi_get_system_info(DMI_PRODUCT_VERSION)); + goto err_unmap; + } + #ifdef CONFIG_DMAR agaw = iommu_calculate_agaw(iommu); if (agaw < 0) { printk(KERN_ERR "Cannot get a valid agaw for iommu (seq_id = %d)\n", iommu->seq_id); - goto error; + goto err_unmap; } msagaw = iommu_calculate_max_sagaw(iommu); if (msagaw < 0) { printk(KERN_ERR "Cannot get a valid max agaw for iommu (seq_id = %d)\n", iommu->seq_id); - goto error; + goto err_unmap; } #endif iommu->agaw = agaw; @@ -665,7 +691,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) } ver = readl(iommu->reg + DMAR_VER_REG); - pr_debug("IOMMU %llx: ver %d:%d cap %llx ecap %llx\n", + pr_info("IOMMU %llx: ver %d:%d cap %llx ecap %llx\n", (unsigned long long)drhd->reg_base_addr, DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver), (unsigned long long)iommu->cap, @@ -675,7 +701,10 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) drhd->iommu = iommu; return 0; -error: + + err_unmap: + iounmap(iommu->reg); + error: kfree(iommu); return -1; } @@ -1212,7 +1241,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id) source_id, guest_addr); fault_index++; - if (fault_index > cap_num_fault_regs(iommu->cap)) + if (fault_index >= cap_num_fault_regs(iommu->cap)) fault_index = 0; spin_lock_irqsave(&iommu->register_lock, flag); } @@ -1305,3 +1334,13 @@ int dmar_reenable_qi(struct intel_iommu *iommu) return 0; } + +/* + * Check interrupt remapping support in DMAR table description. + */ +int dmar_ir_support(void) +{ + struct acpi_table_dmar *dmar; + dmar = (struct acpi_table_dmar *)dmar_tbl; + return dmar->flags & 0x1; +} |